// $Id: edge.cc,v 1.1.1.1 2008/03/19 06:41:21 gdiso Exp $

// The libMesh Finite Element Library.
// Copyright (C) 2002-2007  Benjamin S. Kirk, John W. Peterson

// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.

// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA



// Local includes
#include "edge.h"
#include "node_elem.h"


void Edge::nodes_on_side (const unsigned int i, std::vector<unsigned int> & nodes ) const
{
  genius_assert(i < 2);
  nodes.push_back(i);
}


AutoPtr<DofObject> Edge::side (const unsigned int i) const
{
  genius_assert(i < 2);
  const Elem* parent = this;
  Elem *nodeelem = new NodeElem(const_cast<Elem*>(parent));
  nodeelem->set_node(0) = this->get_node(i);
  return AutoPtr<DofObject>(nodeelem);
}


AutoPtr<Elem> Edge::build_side (const unsigned int i, bool) const
{
  genius_assert(i < 2);
  const Elem* parent = this;
  Elem *nodeelem = new NodeElem(const_cast<Elem*>(parent));
  nodeelem->set_node(0) = this->get_node(i);
  return AutoPtr<Elem>(nodeelem);
}


bool Edge::is_child_on_side(const unsigned int c,
                            const unsigned int s) const
{
  assert (c < this->n_children());
  assert (s < this->n_sides());

  return (c == s);
}
